Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2016
USD ($)
ft²
|
Sep. 30, 2015
USD ($)
|
Sep. 30, 2016
USD ($)
ft²
|
Sep. 30, 2015
USD ($)
|
Dec. 31, 2015
USD ($)
ft²
|
Jun. 30, 2016
ft²
|
May 31, 2016
ft²
|
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| Schedule of Equity Method Investments [Line Items] | ||||||||||
| Differences in basis | $ 3,700 | $ 3,700 | $ 3,900 | |||||||
| Columbus [Member] | ||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||
| Square Feet | ft² | 355,000 | 355,000 | 0 | 355,000 | ||||||
| Company Portion of Contributed Capital to the Joint Venture | $ 40,500 | |||||||||
| Partner's Portion of Contributed Capital to the Joint Venture | $ 40,500 | |||||||||
| Savannah [Member] | ||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||
| Economic interest percentage in joint venture | 98.00% | |||||||||
| Square Feet | ft² | 377,000 | [1] | 419,000 | |||||||
| Estimated Square Feet of Expansion | ft² | 42,000 | |||||||||
| RioCan Canda [Member] | ||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||
| Square Feet | ft² | 901,000 | 901,000 | 870,000 | |||||||
| Joint Ventures Impairment loss | $ 5,800 | |||||||||
| Our Share of Impairment Losses Related to Real Estate Partnerships | 2,900 | |||||||||
| Joint Venture [Member] | ||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||
| Joint Ventures Impairment loss | 5,838 | $ 0 | $ 5,838 | $ 0 | ||||||
| Joint Venture [Member] | Mortgages [Member] | ||||||||||
| Schedule of Equity Method Investments [Line Items] | ||||||||||
| Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net | $ 912 | $ 912 | $ 3,300 | |||||||
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